Improvement in reservoirs for compressed air



BUSHNELL. RESERVOIRS FOR COMPRESSED AIR. 194,217.

"Patented"Au g.v14,1877.

INVENTUR:

,WITNESS'ESI HENHY BUSHNELL,

" ATTYE];

-PETERfi PHOfb-UTHDGRAPHER, WASHINGTON, D C.

UNITED TES PATENT OFFICE.

HENRY BUSHNELL, OF NEW HAVEN, CONNECTICUT.

IMPROVEMENT mssse-n'voms FOR COMPRESSED AIR.

Specification forming part of Letters Patent No. 194,217, dated August 14, 1877; application filed July 21, 1877.

To all whom it may concern:

Be it known that I, HENRY BUSHNELL, of the city of New Haven and State of Connectiout, have invented a new and useful Reservoir for Compressed Air; and I do hereby declare that the following is a full and exact description of the same, referencebeing had to the accompanying drawing, and to the letters of reference marked thereon.

This invention consists, mainly, first, in the employment, as a reservoir for compressed air, of a lap-welded tube, provided at its ends with solid heads, welded in place, the construction being such that a reservoir is obtained which possesses great strength, and is wholly without seam; and, second, in the special means employed, in connection with two or more single tubes, for uniting the same to form a cluster.

In the drawing, Figure 1 represents a longitudinal section of a single tube; Figs. 2 and 3, respectively, side and front elevations, partly in section, of the block or casting by means of which several tubes areconnected; Fig. 4, detail views of one of the bolts by which each tube is connected to the block; Fig. 5, a plan view of all the parts united and in position, and Fig. 6 a partial sectional view enlarged. I

To enable others skilled in the art to make and use my invention, 1 will now proceed to describe fully its construction and manner of operation.

A represents a tube of suitable material and size, which is formed by lapping the edges of a sheet and welding the same together, in the usual well-known or other proper manner. a. or.

represent heads, consisting of solid metal cylin-- more of these tubes may be united to form a cluster in the following manner: a, Fig. 1, represents an opening drilled in one end of the tube, which opening is provided with screwthreads a as shown. B, Figs. 2, 3, and 5, represents a casting or metal block, consisting of a proper number of similar sections, b b, united by pipes 1) b each of which sections is adapted to connect with an independent tube, A, as shown. 12 represents the inner face portion of each section, preferably correspond- 0, Figs, 4 and 5, represents a bolt, having'at one end the head 0, and at the other the threaded portion 0 adapted to engage with the threaded portion a of the tubes opening, as shown. 0 represents a longitudinally central opening, extending from the front end of the bolt to a point near its center, which communicates with a branch or side opening, 0 as shown. 0 represents an annular groove formed about the bolt forthe purpose of providing a proper passage-way for the flow of air.

If desired, copper or other proper packing may be interposed between the face b and the tube end and the face b and the bolt-head. A suitable valve, 01:, or valves, may he applied at at any proper point or points.

The operation will be readily understood. All the parts being in place, as shown in Fig. 5, air may be forced through the main b and branches b to the various sections and tubes.

By means of the construction shown a per fectly-tight joint is made by simple means. The bolt being tapped into the heads, an accurate fit is readily obtained. By means of the bolt, also, connection is made with the passages of the casting, but without affording any opportunity for leakage. The bolt, it will be understood, is adapted, by means of its annular groove, to be screwed into the tube any desired distance without danger of closing the passage-way for the air. This feature is important, because it is essential that a perfectlytight joint should be made, and this cannot be accomplished if the bolt is limited in its movecasting B, a series of bolts, 0, having the annular grooves and perforations, as described.

3. In combination with a tube and intermediate casting, a bolt, substantially as described, adapted to unite the casting to the tube, and

to permit the passage of the air through the casting, as and for the purpose set forth.

This specification signed and witnessed this 20th day of July, 1877.

HENRY BUSHNELL. Witnesses:

CHARLES IvEs, J r., CHARLES IVES. 

